They're no good. I'll take it off your hands for $300.
But seriously, the .243 was "the most balanced cartridge" before anybody heard of the 6.5 Creedmoor. The .243, 6MM Remington, the .257 Roberts (my favorite) are just great dual purpose chamberings and a joy to shoot. I don't have a No. 1 in Varmint configuration but I want one. You ain't gonna take it mountain goat hunting, but we don't have many of those in The Great State. Other folks here can tell you when it was made, etc., but I'll tell you to hang on to it. It's even more fun if you load your own.